Method of producing an elastic plate member for a liquid jet head

Abstract

A method for producing an elastic plate for a liquid jet head, which includes etching a rolled metal plate based on a rolling direction of the rolled metal plate, to form an etched portion and a non-etched portion on the rolled metal plate. The thickness of the etched portion is thinner than the thickness of the non-etched portion and the rolling direction is substantially perpendicular to a long side of the rolled metal plate.

What is claimed is: 
     
         1 . A liquid jet head, comprising:
 a pressure generating chamber;   a nozzle opening which is configured to eject liquid droplets; and   a plate member comprising a rolled metal plate which is made of metal,   wherein the rolled metal plate comprises a longer side and a shorter side, and   wherein the rolling direction of the rolled metal plate is oriented along the shorter side of the rolled metal plate.   
     
     
         2 . The liquid jet head according to  claim 1 , wherein the plate member comprises a polymer film, and
 wherein the plate member has a portion in which there is the polymer film without the rolled metal.   
     
     
         3 . The liquid jet head according to  claim 1 , wherein a plurality of nozzle openings is arranged in the rolling direction. 
     
     
         4 . The liquid jet head according to  claim 1 , wherein the rolled metal plate is made of stainless steel. 
     
     
         5 . The liquid jet head according to  claim 2 , wherein the polymer film is made of a polyphenylene sulfide resin. 
     
     
         6 . The liquid jet head according to  claim 2 , wherein the polymer film is made of a polyimide resin. 
     
     
         7 . The liquid jet head according to  claim 1 , wherein the rolled metal plate has a substantially rectangular shape. 
     
     
         8 . The liquid jet head according to  claim 2 , wherein the polymer film is laminated with the rolled metal plate by bonding. 
     
     
         9 . The liquid jet head according to  claim 2 , wherein the polymer film is laminated to the rolled metal plate by thermal welding.